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Issue 7, 2017
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Significantly improving the efficiency of polymer solar cells through incorporating noncovalent conformational locks

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Abstract

Noncovalent conformational locks have been widely employed to construct highly planar and rigid conjugated systems for organic electronics. In this paper, two conjugated polymers (PDTffBT–TVT and PDTffBT–TVTOEt) were synthesized through the Stille coupling of 4,7-di(thien-2-yl)-5,6-difluoro-2,1,3-benzothiadiazole (DTffBT) with (E)-2-(2-(thiophen-2-yl)vinyl)thiophene (TVT) and (E)-1,2-diethoxy-1,2-di(thiophen-2-yl)ethane (TVTOEt), respectively, to investigate the effect of incorporation of the S⋯O noncovalent conformational locks on the performance of the polymer based bulk heterojunction solar cells. The physicochemical properties and photovoltaic characteristics of the conjugated polymers were fully investigated with different characterization techniques, which demonstrated that incorporation of the noncovalent conformational locks improved the rigidity of the backbone, leading to enhanced charge transport mobilities, and thus higher Jsc and FF. As a result, the efficiencies of the solar cells were significantly improved from 2.59% (PDTffBT–TVT) to 6.16% (PDTffBT–TVTOEt).

Graphical abstract: Significantly improving the efficiency of polymer solar cells through incorporating noncovalent conformational locks

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Supplementary files

Article information


Submitted
05 Nov 2016
Accepted
25 Jan 2017
First published
06 Feb 2017

Mater. Chem. Front., 2017,1, 1317-1323
Article type
Research Article

Significantly improving the efficiency of polymer solar cells through incorporating noncovalent conformational locks

L. Lv, X. Wang, T. Dong, X. Wang, X. Wu, L. Yang and H. Huang, Mater. Chem. Front., 2017, 1, 1317
DOI: 10.1039/C6QM00296J

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